Graph Display Apparatus Coordinate Matching Precision
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Solution Overview
Problem
Conventional graph display apparatuses fail to accurately match the X-coordinate value of a trace pointer with the scale value due to independent settings of coordinate axis display ranges, scale intervals, and dot intervals, leading to incorrect Y-axis value retrieval.
Innovation Solution
The apparatus sets the numerical width of a coordinate axis such that it is one N-th of the number of dots in the axis direction, ensuring that scales are displayed by integer numbers of dots, allowing accurate matching of the trace pointer's coordinate values with the scale, thereby enabling correct Y-axis value calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the numerical width and scale interval of coordinate axes are set independently of the dot interval, then the display range and scale can be adjusted flexibly, but the trace pointer's coordinate values cannot be matched accurately with the scale values
Solution Approach 1:
The patent changes the relationship between parameters by establishing that the numerical width of the coordinate axis must be an integer multiple of the dot interval. This parameter constraint ensures that scale values align with dot positions, allowing the trace pointer to accurately match scale values while maintaining display flexibility through adjustable integer multiples.
2Ease of operation
If the trace pointer is moved to a scale corresponding position to obtain a Y-axis value, then the X-coordinate can be read from the scale, but the X-coordinate value does not match the scale value due to independent settings
Solution Approach 1:
The patent modifies the parameter relationship by requiring the numerical width to be an integer multiple of the dot interval, which ensures that when the trace pointer is positioned at a scale corresponding location, the X-coordinate value accurately matches the scale value, making value retrieval both easy and reliable.
Data Source
Figure 1
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Figure 3A~3B
AI summary
A scientific electronic calculator (1) includes a display unit (15) which performs display by a plurality of dots and a CPU (11) which displays X and Y axes on the display unit (15) and displays scales on the X axis at predetermined scale intervals. The CPU (11) displays a graph in a coordinate system determined by the X and Y axes moves the trace pointer (T) on the graph dot by dot in an X-axis direction according to a user operation, and displays coordinate values of the trace pointer (T) on the display unit (15), while displaying a trace pointer (T) on the graph The CPU (11) sets a numerical width of the X axis in such a way that a value obtained by dividing the numerical width of the X axis by a scale interval is one N-th of the number of dots in an X-axis direction, the N which is an integer, and displays the X axis.